chr22-30346479-T-A

Variant names:

• chr22-30346479-T-A
• rs141721771
• NM_005877.6:c.226A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005877.6(SF3A1):​c.226A>T​(p.Ile76Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: SF3A1 NM_005877.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.74
• Publications: 0 publications found

Genes affected

SF3A1 (HGNC:10765): (splicing factor 3a subunit 1) This gene encodes a subunit of the splicing factor 3a protein complex. The splicing factor 3a heterotrimer is a component of the mature U2 small nuclear ribonucleoprotein particle (snRNP). U2 small nuclear ribonucleoproteins play a critical role in spliceosome assembly and pre-mRNA splicing. [provided by RefSeq, Aug 2014]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005877.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SF3A1	NM_005877.6	MANE Select	c.226A>T	p.Ile76Phe	missense	Exon 3 of 16	NP_005868.1	Q15459-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SF3A1	ENST00000215793.13	TSL:1 MANE Select	c.226A>T	p.Ile76Phe	missense	Exon 3 of 16	ENSP00000215793.7	Q15459-1
	SF3A1	ENST00000872797.1		c.226A>T	p.Ile76Phe	missense	Exon 3 of 16	ENSP00000542856.1
	SF3A1	ENST00000872796.1		c.226A>T	p.Ile76Phe	missense	Exon 3 of 14	ENSP00000542855.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Uncertain	0.025	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	25
DANN	Benign	0.96
DEOGEN2	Benign	0.22	T
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.74
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.65	D
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		7.7
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-2.2	N
REVEL	Benign	0.19
Sift	Benign	0.036	D
Sift4G	Benign	0.12	T
Polyphen		0.97	D
Vest4		0.68
MutPred		0.45		Loss of sheet (P = 0.0315)
MVP		0.39
MPC		2.4
ClinPred		0.84	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.31
gMVP		0.40
Mutation Taster		=50/50

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs141721771; hg19: chr22-30742468;